Noun
airphone (plural airphones)
An air-to-ground telephone service for passengers on airline flights.
Airphone records also indicate that Garnet Bailey made four phone call attempts, trying to reach his wife. citation citation Fangman called a United Airlines office in San Francisco at 08:52, and spoke with Marc Policastro. Source: Internet
The Kahn CSSB method was also briefly used by Airphone as the modulation method employed for early consumer telephone calls that could be placed from an aircraft to ground. Source: Internet